– 85 –
The following is the method of replacement when the motor
is out of order.
1. Remove the first setscrew
of the hand wheel. (4mm hexagonal)
2. Remove the second setscrew
of the hand wheel. (4mm
hexagonal)
3. Remove the pulley cover.
Refer to [(14) Adjustment of external parts –1] Adjustment of pulley cover].
4. Remove the window plate (AK Specification included) located behind
the arm.
5. Loosen two coupling setscrews B
(motor side) from the rear side,
in the order of the first and second screws. (3mm hexagonal)
(Cautions) 1. No adjustments are required for the two coupling
setscrews A
.
2. For the removal of the coupling asm
, loosen two
coupling setscrews A
used to fasten the main
shaft
.
A clearance of 0.5mm shall be secured between the
motor
and the coupling asm
.
3. Do not disassemble the coupling asm
.
6. Remove four motor setscrews
. (Examine motor installations and
the revolving direction.)
7. Pull out the motor
gently from the coupling asm
.
8. Carefully install a new motor
in the mounting position in correct
revolving direction.
9. In the procedures below, reassembly can be carried out in the reverse
order for disassembly.
o If no clearance is secured, this can
be a cause of motor bearing de-
struction.
o After disassembly, reproducibility
will be lost.
The timing belt
used is a product of the highest quality. Therefore, no
maintenance is required.
To make ready for responding to extra occasions, the method of
replacement is explained below.
1. Refer to [4. Maintenance –(5) Replacement of the motor] and
dismantle the motor.
(Cautions) It is unnecessary to dismantle the coupling.
2. Let the sewing machine fall down and remove the float case
as it
is being pulled out.
(Cautions) It is unnecessary to dismantle the lubrication pipes,
etc.
Refer to [4. Maintenance –(3) Lubrication mechanism configuration
and adjustments (DDL-9000A-SS, SH, MA, MS)] and dismantle the
motor.
3. Turn the motor by shifting the timing belt
by hand in the direction
of the arrow.
o When removing the timing belt
,
be careful not to hurt it with a sharp
tool like a screwdriver. Otherwise,
this will be a cause of breakage.
Part name
Part No.
Timing belt
23607302
Adjustment Procedure
Results of Improper Adjustment
Adjustment Procedure
Results of Improper Adjustment
Part name
Part No.
Motor
40050265
Coupling asm
40051473
Summary of Contents for DDL-9000A
Page 14: ... 10 4 Feed locus and phase 1 Timing standard 2 Timing fast 3 Timing slow Standard Adjustment ...
Page 32: ... 28 8 Adjustment of the amount of feeding 4 Optional switch Standard Adjustment ...
Page 60: ... 56 11 Thread trimming unit 7 Replacement of the moving knife Standard Adjustment ...
Page 66: ... 62 11 Thread trimming unit 10 Adjustment of the drive arm stopper Standard Adjustment ...
Page 70: ... 66 12 Adjustment of the wiper DDL 9000A WB OB 2mm 1mm Standard Adjustment ...
Page 72: ... 68 13 Adjustment of feed lever pressure B A Feed lever Standard Adjustment ...
Page 112: ...MEMO ...
